[kmail2] [Bug 336163] New: autocompletion shows multiple entries for one contact with different quotes

[Sandro Knauß]

https://bugs.kde.org/show_bug.cgi?id=336163

            Bug ID: 336163
           Summary: autocompletion shows multiple entries for one contact
                    with different quotes
    Classification: Unclassified
           Product: kmail2
           Version: Git (master)
          Platform: Compiled Sources
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: composer
          Assignee: kdepim-bugs at kde.org
          Reporter: knauss at kolabsys.com

When typing a name you can get multiple results, that only differ in the
quoutes they have:

John Doe <doe at example.com>
"John Doe" <doe at example.com>
"'John Doe'" <doe at example.com>

This is annoying and some versions are not allowed by RFC 2822.

The bug should be either fixed in  AddresseeLineEdit::addContact
[kdepim]/libkdepim/addressline/addresslineedit or KPIMUtils::normalizedAddress
[kdepimlibs]/kpimutils/email.

relevant part of the RFC 2822:

to              =       "To:" address-list CRLF
address-list    =       (address *("," address)) / obs-addr-list
address         =       mailbox / group
mailbox         =       name-addr / addr-spec
name-addr       =       [display-name] angle-addr
angle-addr      =       [CFWS] "<" addr-spec ">" [CFWS] / obs-angle-addr
display-name    =       phrase
phrase          =       1*word / obs-phrase
word            =       atom / quoted-string

atom            =       [CFWS] 1*atext [CFWS]
atext           =       ALPHA / DIGIT / ; Any character except controls,
                        "!" / "#" /     ;  SP, and specials.
                        "$" / "%" /     ;  Used for atoms
                        "&" / "'" /
                        "*" / "+" /
                        "-" / "/" /
                        "=" / "?" /
                        "^" / "_" /
                        "`" / "{" /
                        "|" / "}" /
                        "~"

quoted-string   =       [CFWS]
                        DQUOTE *([FWS] qcontent) [FWS] DQUOTE
                        [CFWS]
qcontent        =       qtext / quoted-pair
qtext           =       NO-WS-CTL /     ; Non white space controls

                        %d33 /          ; The rest of the US-ASCII
                        %d35-91 /       ;  characters not including "\"
                        %d93-126        ;  or the quote character

quoted-pair     =       ("\" text) / obs-qp
text            =       %d1-9 /         ; Characters excluding CR and LF
                        %d11 /
                        %d12 /
                        %d14-127 /
                        obs-text
obs-qp          =       "\" (%d0-127)
obs-text        =       *LF *CR *(obs-char *LF *CR)
obs-char        =       %d0-9 / %d11 /          ; %d0-127 except CR and
                        %d12 / %d14-127         ;  LF


Reproducible: Always

Steps to Reproduce:
1. enter a name "Doe"
2. get mutliple results (from baloo)


Expected Results:  
only one valid result.

The bug #316036 is about different versions writing an email address. This one
here cares about RFC and quotes.

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